Understanding the Human Circulatory System

What is the main function of the circulatory system?

• To provide structural support to the body.

• To facilitate the exchange of gases in the lungs.

• To transport blood and essential substances throughout the body.

• To digest food and absorb nutrients.

Which organ is primarily responsible for pumping blood?

• lungs

• heart

• liver

• kidneys

What type of blood vessel carries oxygenated blood away from the heart?

• Veins

• Capillaries

• Venules

• Arteries

What is the largest artery in the human body?

• femoral artery

• pulmonary artery

• aorta

• coronary artery

Which component of blood is responsible for transporting oxygen?

• Plasma

• White blood cells

• Platelets

• Hemoglobin

What is the name of the liquid part of blood?

• serum

• plasma

• white blood cells

• red blood cells

What type of blood vessel returns deoxygenated blood to the heart?

• Aorta

• Capillaries

• Veins

• Arteries

What is the normal range of heartbeats per minute for a resting adult?

• 120 to 140 beats per minute

• 100 to 120 beats per minute

• 40 to 60 beats per minute

• 60 to 100 beats per minute

What is the role of platelets in the blood?

• Platelets help in blood clotting and stopping bleeding.

• Platelets regulate blood pressure.

• Platelets are responsible for nutrient absorption.

• Platelets transport oxygen in the blood.

Which part of the heart receives deoxygenated blood from the body?

• Right ventricle

• Aorta

• Left atrium

• Right atrium